#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 0.0 0.0 23.389232583107443 56.626121335984806 -gcp 0.0 15939.0 23.419715498305592 56.628985448158964 -gcp 11976.0 15939.0 23.423613680036965 56.616359513297844 -gcp 11976.0 0.0 23.393140629441007 56.61349637163512 03_Rajons_DobeleZ/LNA_KFFDA_F106_1_3825N.jpg LNA_KFFDA_F106_1_3825N.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n0.0 15939.0\n11976.0 15939.0\n11976.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_3825N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_3825N.vrt LNA_KFFDA_F106_1_3825N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_3825N.cut.vrt LNA_KFFDA_F106_1_3825N.xyz